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Diffstat (limited to 'arch/arm/mach-imx/mmdc.c')
-rw-r--r--arch/arm/mach-imx/mmdc.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/mmdc.c b/arch/arm/mach-imx/mmdc.c
index 7a9686ad994c..3729d90cfa46 100644
--- a/arch/arm/mach-imx/mmdc.c
+++ b/arch/arm/mach-imx/mmdc.c
@@ -21,6 +21,12 @@
#define BP_MMDC_MAPSR_PSD 0
#define BP_MMDC_MAPSR_PSS 4
+#define MMDC_MDMISC 0x18
+#define BM_MMDC_MDMISC_DDR_TYPE 0x18
+#define BP_MMDC_MDMISC_DDR_TYPE 0x3
+
+static int ddr_type;
+
static int imx_mmdc_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
@@ -31,6 +37,12 @@ static int imx_mmdc_probe(struct platform_device *pdev)
mmdc_base = of_iomap(np, 0);
WARN_ON(!mmdc_base);
+ reg = mmdc_base + MMDC_MDMISC;
+ /* Get ddr type */
+ val = readl_relaxed(reg);
+ ddr_type = (val & BM_MMDC_MDMISC_DDR_TYPE) >>
+ BP_MMDC_MDMISC_DDR_TYPE;
+
reg = mmdc_base + MMDC_MAPSR;
/* Enable automatic power saving */
@@ -51,6 +63,11 @@ static int imx_mmdc_probe(struct platform_device *pdev)
return 0;
}
+int imx_mmdc_get_ddr_type(void)
+{
+ return ddr_type;
+}
+
static struct of_device_id imx_mmdc_dt_ids[] = {
{ .compatible = "fsl,imx6q-mmdc", },
{ /* sentinel */ }